Ok, you do have a point about the degree of similarity. However, I slightly goofed by not providing a more complete quote and therefore not providing the proper context to illustrate why the word shouldn't be used. Guess I was a bit sleepy too.. Actually, there's a good example above of what you just made a point about: "more complete" - the degree of completeness.
In the case of the "exactly" example, you should simply omit the word "exactly." It's superfluous because you've used the word "same." If something is "the same" it should already be a given that it is exact. Otherwise it isn't the same. So "almost exactly the same" should be just "almost the same," or alternately, "almost exact."
I'll give you the "install" as a matter of style.
Bruno